1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/priv.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 #include <sys/cdio.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/stat.h> 55 #include <sys/syslog.h> 56 #include <sys/iconv.h> 57 58 #include <fs/cd9660/iso.h> 59 #include <fs/cd9660/iso_rrip.h> 60 #include <fs/cd9660/cd9660_node.h> 61 #include <fs/cd9660/cd9660_mount.h> 62 63 #include <geom/geom.h> 64 #include <geom/geom_vfs.h> 65 66 MALLOC_DEFINE(M_ISOFSMNT, "isofs_mount", "ISOFS mount structure"); 67 MALLOC_DEFINE(M_ISOFSNODE, "isofs_node", "ISOFS vnode private part"); 68 69 struct iconv_functions *cd9660_iconv = NULL; 70 71 static vfs_mount_t cd9660_mount; 72 static vfs_cmount_t cd9660_cmount; 73 static vfs_unmount_t cd9660_unmount; 74 static vfs_root_t cd9660_root; 75 static vfs_statfs_t cd9660_statfs; 76 static vfs_vget_t cd9660_vget; 77 static vfs_fhtovp_t cd9660_fhtovp; 78 79 static struct vfsops cd9660_vfsops = { 80 .vfs_fhtovp = cd9660_fhtovp, 81 .vfs_mount = cd9660_mount, 82 .vfs_cmount = cd9660_cmount, 83 .vfs_root = cd9660_root, 84 .vfs_statfs = cd9660_statfs, 85 .vfs_unmount = cd9660_unmount, 86 .vfs_vget = cd9660_vget, 87 }; 88 VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); 89 MODULE_VERSION(cd9660, 1); 90 91 static int iso_mountfs(struct vnode *devvp, struct mount *mp); 92 93 /* 94 * VFS Operations. 95 */ 96 97 static int 98 cd9660_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 99 { 100 struct iso_args args; 101 int error; 102 103 error = copyin(data, &args, sizeof args); 104 if (error) 105 return (error); 106 107 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 108 ma = mount_arg(ma, "export", &args.export, sizeof args.export); 109 ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64); 110 ma = mount_argsu(ma, "cs_local", args.cs_local, 64); 111 ma = mount_argf(ma, "ssector", "%u", args.ssector); 112 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NORRIP), "norrip"); 113 ma = mount_argb(ma, args.flags & ISOFSMNT_GENS, "nogens"); 114 ma = mount_argb(ma, args.flags & ISOFSMNT_EXTATT, "noextatt"); 115 ma = mount_argb(ma, !(args.flags & ISOFSMNT_NOJOLIET), "nojoliet"); 116 ma = mount_argb(ma, 117 args.flags & ISOFSMNT_BROKENJOLIET, "nobrokenjoliet"); 118 ma = mount_argb(ma, args.flags & ISOFSMNT_KICONV, "nokiconv"); 119 120 error = kernel_mount(ma, flags); 121 122 return (error); 123 } 124 125 static int 126 cd9660_mount(struct mount *mp, struct thread *td) 127 { 128 struct vnode *devvp; 129 char *fspec; 130 int error; 131 accmode_t accmode; 132 struct nameidata ndp; 133 struct iso_mnt *imp = 0; 134 135 /* 136 * Unconditionally mount as read-only. 137 */ 138 MNT_ILOCK(mp); 139 mp->mnt_flag |= MNT_RDONLY; 140 MNT_IUNLOCK(mp); 141 142 fspec = vfs_getopts(mp->mnt_optnew, "from", &error); 143 if (error) 144 return (error); 145 146 imp = VFSTOISOFS(mp); 147 148 if (mp->mnt_flag & MNT_UPDATE) { 149 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) 150 return (0); 151 } 152 /* 153 * Not an update, or updating the name: look up the name 154 * and verify that it refers to a sensible block device. 155 */ 156 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td); 157 if ((error = namei(&ndp))) 158 return (error); 159 NDFREE(&ndp, NDF_ONLY_PNBUF); 160 devvp = ndp.ni_vp; 161 162 if (!vn_isdisk(devvp, &error)) { 163 vput(devvp); 164 return (error); 165 } 166 167 /* 168 * Verify that user has necessary permissions on the device, 169 * or has superuser abilities 170 */ 171 accmode = VREAD; 172 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); 173 if (error) 174 error = priv_check(td, PRIV_VFS_MOUNT_PERM); 175 if (error) { 176 vput(devvp); 177 return (error); 178 } 179 180 if ((mp->mnt_flag & MNT_UPDATE) == 0) { 181 error = iso_mountfs(devvp, mp); 182 if (error) 183 vrele(devvp); 184 } else { 185 if (devvp != imp->im_devvp) 186 error = EINVAL; /* needs translation */ 187 vput(devvp); 188 } 189 if (error) 190 return (error); 191 vfs_mountedfrom(mp, fspec); 192 return (0); 193 } 194 195 /* 196 * Common code for mount and mountroot 197 */ 198 static int 199 iso_mountfs(devvp, mp) 200 struct vnode *devvp; 201 struct mount *mp; 202 { 203 struct iso_mnt *isomp = (struct iso_mnt *)0; 204 struct buf *bp = NULL; 205 struct buf *pribp = NULL, *supbp = NULL; 206 struct cdev *dev; 207 int error = EINVAL; 208 int high_sierra = 0; 209 int iso_bsize; 210 int iso_blknum; 211 int joliet_level; 212 struct iso_volume_descriptor *vdp = 0; 213 struct iso_primary_descriptor *pri = NULL; 214 struct iso_sierra_primary_descriptor *pri_sierra = NULL; 215 struct iso_supplementary_descriptor *sup = NULL; 216 struct iso_directory_record *rootp; 217 int logical_block_size, ssector; 218 struct g_consumer *cp; 219 struct bufobj *bo; 220 char *cs_local, *cs_disk; 221 222 dev = devvp->v_rdev; 223 dev_ref(dev); 224 DROP_GIANT(); 225 g_topology_lock(); 226 error = g_vfs_open(devvp, &cp, "cd9660", 0); 227 g_topology_unlock(); 228 PICKUP_GIANT(); 229 VOP_UNLOCK(devvp, 0); 230 if (error) 231 goto out; 232 if (devvp->v_rdev->si_iosize_max != 0) 233 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; 234 if (mp->mnt_iosize_max > MAXPHYS) 235 mp->mnt_iosize_max = MAXPHYS; 236 237 bo = &devvp->v_bufobj; 238 239 /* This is the "logical sector size". The standard says this 240 * should be 2048 or the physical sector size on the device, 241 * whichever is greater. 242 */ 243 if ((ISO_DEFAULT_BLOCK_SIZE % cp->provider->sectorsize) != 0) { 244 error = EINVAL; 245 goto out; 246 } 247 248 iso_bsize = cp->provider->sectorsize; 249 250 joliet_level = 0; 251 if (1 != vfs_scanopt(mp->mnt_optnew, "ssector", "%d", &ssector)) 252 ssector = 0; 253 for (iso_blknum = 16 + ssector; 254 iso_blknum < 100 + ssector; 255 iso_blknum++) { 256 if ((error = bread(devvp, iso_blknum * btodb(ISO_DEFAULT_BLOCK_SIZE), 257 iso_bsize, NOCRED, &bp)) != 0) 258 goto out; 259 260 vdp = (struct iso_volume_descriptor *)bp->b_data; 261 if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { 262 if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, 263 sizeof vdp->id_sierra) != 0) { 264 error = EINVAL; 265 goto out; 266 } else 267 high_sierra = 1; 268 } 269 switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ 270 case ISO_VD_PRIMARY: 271 if (pribp == NULL) { 272 pribp = bp; 273 bp = NULL; 274 pri = (struct iso_primary_descriptor *)vdp; 275 pri_sierra = 276 (struct iso_sierra_primary_descriptor *)vdp; 277 } 278 break; 279 280 case ISO_VD_SUPPLEMENTARY: 281 if (supbp == NULL) { 282 supbp = bp; 283 bp = NULL; 284 sup = (struct iso_supplementary_descriptor *)vdp; 285 286 if (!vfs_flagopt(mp->mnt_optnew, "nojoliet", NULL, 0)) { 287 if (bcmp(sup->escape, "%/@", 3) == 0) 288 joliet_level = 1; 289 if (bcmp(sup->escape, "%/C", 3) == 0) 290 joliet_level = 2; 291 if (bcmp(sup->escape, "%/E", 3) == 0) 292 joliet_level = 3; 293 294 if ((isonum_711 (sup->flags) & 1) && 295 !vfs_flagopt(mp->mnt_optnew, "brokenjoliet", NULL, 0)) 296 joliet_level = 0; 297 } 298 } 299 break; 300 301 case ISO_VD_END: 302 goto vd_end; 303 304 default: 305 break; 306 } 307 if (bp) { 308 brelse(bp); 309 bp = NULL; 310 } 311 } 312 vd_end: 313 if (bp) { 314 brelse(bp); 315 bp = NULL; 316 } 317 318 if (pri == NULL) { 319 error = EINVAL; 320 goto out; 321 } 322 323 logical_block_size = 324 isonum_723 (high_sierra? 325 pri_sierra->logical_block_size: 326 pri->logical_block_size); 327 328 if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE 329 || (logical_block_size & (logical_block_size - 1)) != 0) { 330 error = EINVAL; 331 goto out; 332 } 333 334 rootp = (struct iso_directory_record *) 335 (high_sierra? 336 pri_sierra->root_directory_record: 337 pri->root_directory_record); 338 339 isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); 340 isomp->im_cp = cp; 341 isomp->im_bo = bo; 342 isomp->logical_block_size = logical_block_size; 343 isomp->volume_space_size = 344 isonum_733 (high_sierra? 345 pri_sierra->volume_space_size: 346 pri->volume_space_size); 347 isomp->joliet_level = 0; 348 /* 349 * Since an ISO9660 multi-session CD can also access previous 350 * sessions, we have to include them into the space consider- 351 * ations. This doesn't yield a very accurate number since 352 * parts of the old sessions might be inaccessible now, but we 353 * can't do much better. This is also important for the NFS 354 * filehandle validation. 355 */ 356 isomp->volume_space_size += ssector; 357 bcopy (rootp, isomp->root, sizeof isomp->root); 358 isomp->root_extent = isonum_733 (rootp->extent); 359 isomp->root_size = isonum_733 (rootp->size); 360 361 isomp->im_bmask = logical_block_size - 1; 362 isomp->im_bshift = ffs(logical_block_size) - 1; 363 364 pribp->b_flags |= B_AGE; 365 brelse(pribp); 366 pribp = NULL; 367 368 mp->mnt_data = isomp; 369 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 370 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 371 mp->mnt_maxsymlinklen = 0; 372 MNT_ILOCK(mp); 373 mp->mnt_flag |= MNT_LOCAL; 374 mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED; 375 MNT_IUNLOCK(mp); 376 isomp->im_mountp = mp; 377 isomp->im_dev = dev; 378 isomp->im_devvp = devvp; 379 380 vfs_flagopt(mp->mnt_optnew, "norrip", &isomp->im_flags, ISOFSMNT_NORRIP); 381 vfs_flagopt(mp->mnt_optnew, "gens", &isomp->im_flags, ISOFSMNT_GENS); 382 vfs_flagopt(mp->mnt_optnew, "extatt", &isomp->im_flags, ISOFSMNT_EXTATT); 383 vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET); 384 vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV); 385 386 /* Check the Rock Ridge Extension support */ 387 if (!(isomp->im_flags & ISOFSMNT_NORRIP)) { 388 if ((error = bread(isomp->im_devvp, 389 (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << 390 (isomp->im_bshift - DEV_BSHIFT), 391 isomp->logical_block_size, NOCRED, &bp)) != 0) 392 goto out; 393 394 rootp = (struct iso_directory_record *)bp->b_data; 395 396 if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { 397 isomp->im_flags |= ISOFSMNT_NORRIP; 398 } else { 399 isomp->im_flags &= ~ISOFSMNT_GENS; 400 } 401 402 /* 403 * The contents are valid, 404 * but they will get reread as part of another vnode, so... 405 */ 406 bp->b_flags |= B_AGE; 407 brelse(bp); 408 bp = NULL; 409 } 410 411 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 412 cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error); 413 if (error) 414 goto out; 415 cs_disk = vfs_getopts(mp->mnt_optnew, "cs_disk", &error); 416 if (error) 417 goto out; 418 cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); 419 cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); 420 } else { 421 isomp->im_d2l = NULL; 422 isomp->im_l2d = NULL; 423 } 424 425 if (high_sierra) { 426 /* this effectively ignores all the mount flags */ 427 if (bootverbose) 428 log(LOG_INFO, "cd9660: High Sierra Format\n"); 429 isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; 430 } else 431 switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { 432 default: 433 isomp->iso_ftype = ISO_FTYPE_DEFAULT; 434 break; 435 case ISOFSMNT_GENS|ISOFSMNT_NORRIP: 436 isomp->iso_ftype = ISO_FTYPE_9660; 437 break; 438 case 0: 439 if (bootverbose) 440 log(LOG_INFO, "cd9660: RockRidge Extension\n"); 441 isomp->iso_ftype = ISO_FTYPE_RRIP; 442 break; 443 } 444 445 /* Decide whether to use the Joliet descriptor */ 446 447 if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { 448 if (bootverbose) 449 log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", 450 joliet_level); 451 rootp = (struct iso_directory_record *) 452 sup->root_directory_record; 453 bcopy (rootp, isomp->root, sizeof isomp->root); 454 isomp->root_extent = isonum_733 (rootp->extent); 455 isomp->root_size = isonum_733 (rootp->size); 456 isomp->joliet_level = joliet_level; 457 supbp->b_flags |= B_AGE; 458 } 459 460 if (supbp) { 461 brelse(supbp); 462 supbp = NULL; 463 } 464 465 return 0; 466 out: 467 if (bp) 468 brelse(bp); 469 if (pribp) 470 brelse(pribp); 471 if (supbp) 472 brelse(supbp); 473 if (cp != NULL) { 474 DROP_GIANT(); 475 g_topology_lock(); 476 g_vfs_close(cp); 477 g_topology_unlock(); 478 PICKUP_GIANT(); 479 } 480 if (isomp) { 481 free((caddr_t)isomp, M_ISOFSMNT); 482 mp->mnt_data = NULL; 483 } 484 dev_rel(dev); 485 return error; 486 } 487 488 /* 489 * unmount system call 490 */ 491 static int 492 cd9660_unmount(mp, mntflags, td) 493 struct mount *mp; 494 int mntflags; 495 struct thread *td; 496 { 497 struct iso_mnt *isomp; 498 int error, flags = 0; 499 500 if (mntflags & MNT_FORCE) 501 flags |= FORCECLOSE; 502 if ((error = vflush(mp, 0, flags, td))) 503 return (error); 504 505 isomp = VFSTOISOFS(mp); 506 507 if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { 508 if (isomp->im_d2l) 509 cd9660_iconv->close(isomp->im_d2l); 510 if (isomp->im_l2d) 511 cd9660_iconv->close(isomp->im_l2d); 512 } 513 DROP_GIANT(); 514 g_topology_lock(); 515 g_vfs_close(isomp->im_cp); 516 g_topology_unlock(); 517 PICKUP_GIANT(); 518 vrele(isomp->im_devvp); 519 dev_rel(isomp->im_dev); 520 free((caddr_t)isomp, M_ISOFSMNT); 521 mp->mnt_data = NULL; 522 MNT_ILOCK(mp); 523 mp->mnt_flag &= ~MNT_LOCAL; 524 MNT_IUNLOCK(mp); 525 return (error); 526 } 527 528 /* 529 * Return root of a filesystem 530 */ 531 static int 532 cd9660_root(mp, flags, vpp, td) 533 struct mount *mp; 534 int flags; 535 struct vnode **vpp; 536 struct thread *td; 537 { 538 struct iso_mnt *imp = VFSTOISOFS(mp); 539 struct iso_directory_record *dp = 540 (struct iso_directory_record *)imp->root; 541 ino_t ino = isodirino(dp, imp); 542 543 /* 544 * With RRIP we must use the `.' entry of the root directory. 545 * Simply tell vget, that it's a relocated directory. 546 */ 547 return (cd9660_vget_internal(mp, ino, flags, vpp, 548 imp->iso_ftype == ISO_FTYPE_RRIP, dp)); 549 } 550 551 /* 552 * Get filesystem statistics. 553 */ 554 static int 555 cd9660_statfs(mp, sbp, td) 556 struct mount *mp; 557 struct statfs *sbp; 558 struct thread *td; 559 { 560 struct iso_mnt *isomp; 561 562 isomp = VFSTOISOFS(mp); 563 564 sbp->f_bsize = isomp->logical_block_size; 565 sbp->f_iosize = sbp->f_bsize; /* XXX */ 566 sbp->f_blocks = isomp->volume_space_size; 567 sbp->f_bfree = 0; /* total free blocks */ 568 sbp->f_bavail = 0; /* blocks free for non superuser */ 569 sbp->f_files = 0; /* total files */ 570 sbp->f_ffree = 0; /* free file nodes */ 571 return 0; 572 } 573 574 /* 575 * File handle to vnode 576 * 577 * Have to be really careful about stale file handles: 578 * - check that the inode number is in range 579 * - call iget() to get the locked inode 580 * - check for an unallocated inode (i_mode == 0) 581 * - check that the generation number matches 582 */ 583 584 /* ARGSUSED */ 585 static int 586 cd9660_fhtovp(mp, fhp, vpp) 587 struct mount *mp; 588 struct fid *fhp; 589 struct vnode **vpp; 590 { 591 struct ifid *ifhp = (struct ifid *)fhp; 592 struct iso_node *ip; 593 struct vnode *nvp; 594 int error; 595 596 #ifdef ISOFS_DBG 597 printf("fhtovp: ino %d, start %ld\n", 598 ifhp->ifid_ino, ifhp->ifid_start); 599 #endif 600 601 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 602 *vpp = NULLVP; 603 return (error); 604 } 605 ip = VTOI(nvp); 606 if (ip->inode.iso_mode == 0) { 607 vput(nvp); 608 *vpp = NULLVP; 609 return (ESTALE); 610 } 611 *vpp = nvp; 612 vnode_create_vobject(*vpp, ip->i_size, curthread); 613 return (0); 614 } 615 616 static int 617 cd9660_vget(mp, ino, flags, vpp) 618 struct mount *mp; 619 ino_t ino; 620 int flags; 621 struct vnode **vpp; 622 { 623 624 /* 625 * XXXX 626 * It would be nice if we didn't always set the `relocated' flag 627 * and force the extra read, but I don't want to think about fixing 628 * that right now. 629 */ 630 return (cd9660_vget_internal(mp, ino, flags, vpp, 631 #if 0 632 VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, 633 #else 634 0, 635 #endif 636 (struct iso_directory_record *)0)); 637 } 638 639 int 640 cd9660_vget_internal(mp, ino, flags, vpp, relocated, isodir) 641 struct mount *mp; 642 ino_t ino; 643 int flags; 644 struct vnode **vpp; 645 int relocated; 646 struct iso_directory_record *isodir; 647 { 648 struct iso_mnt *imp; 649 struct iso_node *ip; 650 struct buf *bp; 651 struct vnode *vp; 652 struct cdev *dev; 653 int error; 654 struct thread *td; 655 656 td = curthread; 657 error = vfs_hash_get(mp, ino, flags, td, vpp, NULL, NULL); 658 if (error || *vpp != NULL) 659 return (error); 660 661 /* 662 * We must promote to an exclusive lock for vnode creation. This 663 * can happen if lookup is passed LOCKSHARED. 664 */ 665 if ((flags & LK_TYPE_MASK) == LK_SHARED) { 666 flags &= ~LK_TYPE_MASK; 667 flags |= LK_EXCLUSIVE; 668 } 669 670 /* 671 * We do not lock vnode creation as it is believed to be too 672 * expensive for such rare case as simultaneous creation of vnode 673 * for same ino by different processes. We just allow them to race 674 * and check later to decide who wins. Let the race begin! 675 */ 676 677 imp = VFSTOISOFS(mp); 678 dev = imp->im_dev; 679 680 /* Allocate a new vnode/iso_node. */ 681 if ((error = getnewvnode("isofs", mp, &cd9660_vnodeops, &vp)) != 0) { 682 *vpp = NULLVP; 683 return (error); 684 } 685 ip = malloc(sizeof(struct iso_node), M_ISOFSNODE, 686 M_WAITOK | M_ZERO); 687 vp->v_data = ip; 688 ip->i_vnode = vp; 689 ip->i_number = ino; 690 691 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); 692 error = insmntque(vp, mp); 693 if (error != 0) { 694 free(ip, M_ISOFSNODE); 695 *vpp = NULLVP; 696 return (error); 697 } 698 error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL); 699 if (error || *vpp != NULL) 700 return (error); 701 702 if (isodir == 0) { 703 int lbn, off; 704 705 lbn = lblkno(imp, ino); 706 if (lbn >= imp->volume_space_size) { 707 vput(vp); 708 printf("fhtovp: lbn exceed volume space %d\n", lbn); 709 return (ESTALE); 710 } 711 712 off = blkoff(imp, ino); 713 if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { 714 vput(vp); 715 printf("fhtovp: crosses block boundary %d\n", 716 off + ISO_DIRECTORY_RECORD_SIZE); 717 return (ESTALE); 718 } 719 720 error = bread(imp->im_devvp, 721 lbn << (imp->im_bshift - DEV_BSHIFT), 722 imp->logical_block_size, NOCRED, &bp); 723 if (error) { 724 vput(vp); 725 brelse(bp); 726 printf("fhtovp: bread error %d\n",error); 727 return (error); 728 } 729 isodir = (struct iso_directory_record *)(bp->b_data + off); 730 731 if (off + isonum_711(isodir->length) > 732 imp->logical_block_size) { 733 vput(vp); 734 if (bp != 0) 735 brelse(bp); 736 printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", 737 off +isonum_711(isodir->length), off, 738 isonum_711(isodir->length)); 739 return (ESTALE); 740 } 741 742 #if 0 743 if (isonum_733(isodir->extent) + 744 isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { 745 if (bp != 0) 746 brelse(bp); 747 printf("fhtovp: file start miss %d vs %d\n", 748 isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), 749 ifhp->ifid_start); 750 return (ESTALE); 751 } 752 #endif 753 } else 754 bp = 0; 755 756 ip->i_mnt = imp; 757 758 if (relocated) { 759 /* 760 * On relocated directories we must 761 * read the `.' entry out of a dir. 762 */ 763 ip->iso_start = ino >> imp->im_bshift; 764 if (bp != 0) 765 brelse(bp); 766 if ((error = cd9660_blkatoff(vp, (off_t)0, NULL, &bp)) != 0) { 767 vput(vp); 768 return (error); 769 } 770 isodir = (struct iso_directory_record *)bp->b_data; 771 } 772 773 ip->iso_extent = isonum_733(isodir->extent); 774 ip->i_size = isonum_733(isodir->size); 775 ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; 776 777 /* 778 * Setup time stamp, attribute 779 */ 780 vp->v_type = VNON; 781 switch (imp->iso_ftype) { 782 default: /* ISO_FTYPE_9660 */ 783 { 784 struct buf *bp2; 785 int off; 786 if ((imp->im_flags & ISOFSMNT_EXTATT) 787 && (off = isonum_711(isodir->ext_attr_length))) 788 cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, 789 &bp2); 790 else 791 bp2 = NULL; 792 cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); 793 cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); 794 if (bp2) 795 brelse(bp2); 796 break; 797 } 798 case ISO_FTYPE_RRIP: 799 cd9660_rrip_analyze(isodir, ip, imp); 800 break; 801 } 802 803 if (bp != 0) 804 brelse(bp); 805 806 /* 807 * Initialize the associated vnode 808 */ 809 switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { 810 case VFIFO: 811 vp->v_op = &cd9660_fifoops; 812 break; 813 default: 814 VN_LOCK_ASHARE(vp); 815 break; 816 } 817 818 if (ip->iso_extent == imp->root_extent) 819 vp->v_vflag |= VV_ROOT; 820 821 /* 822 * XXX need generation number? 823 */ 824 825 *vpp = vp; 826 return (0); 827 } 828